Stairway.



No. 794,908. P-ATENTBD JULY 18.1905.

2. A. WINSLOW.

STAIRWAY.

APPLICATION rnsn me. so, 1904.

No. 794,908. iatentecl July 18, 1905.

NITED STATES PATENT riucn.

FRANCIS A. \VINSLOVV, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WINS- LOWBROS. COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

STAIRWAY.

SPECIFICATION forming part of Letters Patent NO. 794,908, dated July 18,1905. Application filed August 20, 1904;- Serial No. 221,580.

To all whom it may concern: riser and above the soffit is filled withcon- Be it known that I, FRANoIs A. WINSLOW, crete to form a step of theordinary form, as 5 a citizen of the United States of America,reillustrated.

siding at Chicago, in the county of Cook and My improved method ofconstruction is par- State of Illinois, have invented certain newticularly advantageous in wide stairways. and useful Improvements inStairways, of Heretofore it has been necessary to place a which thefollowing is a specification. strengthening-beam below the central lineof My invention relates to certain new and a wide stairway to brace thesame; but such useful improvements in Stairways; and its oba structurepossesses certain disadvantages 1O ject is to produce a device of this'class which which are removed by my improved construcshall have certainadvantages which will aption. In many instances the space below a pearmore fully and at large in the course of stairway is so small as to makeit practically this specification. impossible to have adownwardly-projecting To this end my invention consists in certain beambelow the lower line of the risers, and

I 5 novel features, which are shown in the accomin any case such a beambreaks the fiat sofiit panying drawings as embodied in my preandinterferes with any scheme of ornamenferred form of construction. tationwhich might be adopted. With the de- 5 In the aforesaid drawings, Figure1 is a lonvice herein shown each riser is braced by the gitudinalsection through my improved stairtruss-rod on its rear face, and noadditional 2 way. Fig. 2is atransverse section in the line central braceis necessary for a stairway of 2 2 of Fig. 1 looking in the direction ofthe any practicable or desirable width. Thus arrow, and Fig. 3 is aperspective view of the space is gained below the stairway without rearface of one of the risers. any accompanying weakening of the struc-Referring to the drawings, A is the soflit of ture, and at the same timea large unbroken 5 myimproved stairway, the same being formed surface isprovided upon which a consistent of a plate of metal having a flat lowersurface ornamental scheme can be worked out. which affords a good basisfor such ornamen- I realize that considerable variation is pos- 7 5tation as is common in high-grade interior sible in the details of thisconstruction withironwork. To this sofiit are secured a pluout departingfrom the spirit of the inven- 3 rality of risers B, each of the risershaving at tion, and I therefore do not intend. to limit its lower end adownwardly-projecting flange myself to the specific form herein shownand b, which is riveted or otherwise secured to the described. 0 soffitA. The sofiit is secured at its edges to I claim as new and desire tosecure by Letside beams C, to which the ends of the risers ters Patent35 are also secured. 1. In a device of the class described, the

On the rear of each of the risers B are two combination with a sofi'itand a riser secured lugs b at the upper corners, and a third lugthereto, of a truss-rod wholly supported on 8 5 b is provided at thecenter near the lower the rear of the riser, said truss-rod running edgeof the riser. A truss-rod D is hooked from the two upper corners of theriser and 4 at its ends over the lugs b and at its center over asuitableengagement device at the cenengages with the lug The truss-rod is in terof the lower edge. practice shrunk into place on the riser by 2. In adevice of the class described, the 9 heating it and placing it inposition. When combination with a soifit and risers secured cooled, itwill be evident that the center of thereto, of an integral lug at eachupper cor- 45 the riser will be subjected to a strong upward ner of therisers and at the center of the lower pull, which will tend to stiffenthe riser very edges thereof, and trussrods running over materially.After the metal work of the said lugs. stairway is assembled the spacebehind each 3. In a device of the class described, the

combination With a soflit and risers secured application for LettersPatent, at Chicago, in thereto, of a lug at each upper corner of the thecounty of Cook and State of Illinois, this risers and at. the center ofthe lower edges 15th day of August, A. D. 1904.

thereof, truss-rods running over said lugs, FRANCIS A. WINSLOW. 5 and abody of concrete filling the space be- WVitnesses:

hind each riser and above the soffit. CHARLES S. SAXE,

In witness whereof I have signed the above W. R. IiAVANAUGH.

